Spraying apparatus.



No. 646,523. Patented Apr. 3, I900.

G. A. 81. R. F. DUNN.

SPRAYING APPARATUS.

(Application filed July 17 1899.)

(No Model.)

m: uonms mans co. PnOYQLIYHQ. WASNINOWN. q. cv

UNITED STATES PATENT OFFICE.

GEORGE AMBROSE DUNN AND ROBERT FRANKLIN DUNN, OF DINUBA,

' CALIFORNIA.

SPRAYING APPARATUS.

SPECIFICATION forming partof Letters Patent No. 646,523, dated April 3,1900.

I Application filed July 17, 1899. Serial No. 724,070, (No model.)

To aZZ whom it may concern.-

Be it known that we, GEORGE AMBROSE DUNN, a citizen of Canada, andROBERT FRANKLIN DUNN, a citizen of the United States, both residing atDinuba, county of Tulare, State of California, have invented anImprovement in Spraying Apparatus; and we hereby declare the followingto be a full, clear, and exact description of the same.

Our invention relates to an apparatus which is especially designed forspraying fruit-trees, plants, and other like purposes.

It consists of a main containing-reservoir, a supplemental closedchamber, with connections by which liquid-is delivered from the first tothe second chambers, an air-pumping mechanism connecting with the closedchamber and through it discharging air into the main chamber,independent liquid and air conveying pipes lashed together, a nozzle common to both, with automatic discharge-regulating Valve for either liquidor air, and means for agitating the liquid to keep it thoroughly mixedbefore being discharged.

The invention also comprises details of con struction, which will bemore fully explained by reference to the accompanying drawings, inwhich-- I Figure 1 is an elevation of the apparatus.

Fig. 2 shows our improvement applied to a knapsack apparatus. Fig. 3shows the valve in the nozzle for the air-passage. Fig. I is a similarview showing the valve in the liquid-passage. v

A is the containing-reservoir, into which the liquid and any substanceto be mixed with it are placed. B is a second chamber, which is madetight, so that some pressure of air can be forced into it. The twochambers are mounted upon any suitable supporting stand or platform withthe closed chamber B sufficiently lower than the chamber A to-allow.

liquid to pass from A to B by gravitation through connecting-pipe F. i

G is a cook or valve controlling the passage between the two chambers.

The end of the pipe which opens into'the lower part of the reservoir Ais expanded and has a cap upon the top, and underneath this cap thebell-shaped expanded end isperforated with holes, as shown at E, for apurpose to be hereinafter described. C is an air-pump of anydescription, and H is a pipe leading from the air-pump into the receiver13. This receiver, as shown in Fig. 1, is stationary, being designed fora large apparatus but a receiver of similar nature may be designed to becarried upon the back of a person and is known as the knapsackapparatus. The connecting air-pipe may be made flexible where it entersthe chamberB, extending downwardly from the upper part to near thebottom, weighted, as shown at H, so that it will hang with the lower anddisoharge end nearthe bottom of the chamber B. The pipe K is soconnected that its mouth or inlet is near the bottom of the chamber B,and it connects with a flexible tube N, lead ing to a nozzle S.

In the stationary apparatus as shown in Fig. l we have shown a verticalstand-pipe D extending upwardly fromthe top of thechamber B and having adischarge-pipe I, with a I controlling-cock near the upper end. Anairpipe J connects with the top of this pipe D, and from it a flexiblehose M, which also extends to and connects with the nozzle S. Thesetubes are connected together, the liquid-tube having a regulating-cock Pand the air-tube a similar cock 0. The nozzle S has two passages made init, one receiving the liquid and the other receiving air. These twopassages converge and unite at the discharge end of the nozzle, asshown. Within the nozzle and adapted to control either the liquid or theair passage, or both, is a metal ball-valve a, and the passages in thenozzle are so chambered that the ball may be entirely removed from thepassage which it controls, thus allowing a free flow of either air orliquid, or it may be seated upon a ribbed seat, as shown at V, whichpartially checks the flow of the air or liquid which the valve controls.As shown at S, when the nozzle is pointed upward the valve 0, rests inthe pocket in the lower side of the passage through which the airpasses, thus allowing the air to flow freely without hindrance throughthe discharge-passage. If the nozzle is turned downward, as shown at Sthe 'ballwill roll down upon the seat V and will thus partially checkthe flow of air, but will allow the liquid to flow freely. As shown atS", the valve a, which controls the liquid discharge, is within apocket, which takes it out of the liquid-passage, and, the nozzle beingpointed or inclined downwardly, the liquid will be free to pass throughthe discharge. Vhen turned as shown at S, with the nozzle pointingupwardly, the valve which controls the liquid-passage drops into theline of discharge of the liquid and, resting against the ribbed seat,reduces the amount of liquid which is discharged with the air. By thisconstruction the ball-valve becomes an auxiliary to the governing-cocksO and P and is especially useful when the change of position of thenozzle is required. Thus when the nozzle is held so as to dischargedownwardly the flow of liquid is much greater and must be controlledeither by shutting off the flow of a portion of the liquid or byincreasing the flow of air.

The operation will then be as follows: The tank or reservoir A is filledwith the spraying liquid and the governing-cocks G and I are opened. Theopening of the cock 1 allows the air to escape from the closed chamberB, and the liquid will flow through the pipe F and the cock G and willfill the chamber B. Afterward the cocks G and I are closed. The pump isthen operated, and the air being forced into the chamber B will agitatethe liquid as it passes through it in its course upward into the pipe D.Suificient internal pressure being produced, the air is allowed to passthrough the pipe J and the hose M and the liquid through the pipe K andthe hose N to the point S, where the two meet and are discharged throughthe single nozzle or passage in the form of a spray, the character ofwhich will be determined by the air-pressure and also by theproportionate amount of air and liquid which is being discharged. Thenthe liquid has been exhausted from the chamber B, the controlling-cock Gis opened and the air remainingcompressed in the chamber 3 will escapeinto the reservoir A with sufficient force to agitate the liquidtherein. The bell-shaped and perforated mouth E of the pipe F within thechamber A has the effect of discharging the air downwardly andoutwardly, so that any heavy sediment within the reservoir A will bethoroughly agitated and stirred up, so that the liquid is in conditionto be again drawn into the chamber B, which is done after the force ofthe air is spent by again opening the air-escape cock I of thestand-pipe D until the chamber B is filled with liquid and the work thuscontinued. It will be manifest that the arrangement of pipes shown inwhat is termed the knapsack apparatus is similar to that shown in Fig.1; but the tubes may, either one or both of them, be allowed to swingfreely by reason of their flexible character, so that the passage of theair and liquid through these tubes will act to agitate the liquid invthe receiver.

This device can be used as either a high or low pressure sprayingapparatus by varying the air and liquid pressure and discharge.

The ball-valve arrangement assists in giving a uniform spray and theauxiliary closechamber B obviates the necessity of a large and expensiveair-tight receiver.

Having thus described our invention, what we claim as new, and desire tosecure by Letters Patent, is

1. The combination of a main reservoir, a supplemental closed chamberwith connecting-pipe through which the liquid can flow by gravity, anair-pum p connecting therewith and liquid and air discharge pipesleading from the top and bottom of said chamber respectively, said pipesbeing united and discharging through a common delivery-nozzle.

2. A main reservoir, a supplemental tight chamber with pipe throughwhich liquid may flow from the main to the supplemental reservoir, anair-pump with pipe connecting it with the supplemental reservoir, abell-shaped perforated nozzle upon the end of the connecting-pipe withinthe main reservoir and a cock through which air may be discharged fromthe supplemental to the main chamber through said perforated cap orliquid delivered from the main to the supplemental chamber when theair-pressure is exhausted.

3. A main reservoir, a supplemental closed chamber, a pipe having aperforated bellcap within the main chamber, said pipe connecting withthe supplemental chamber and having a controlling-cock, an air-pump withpipe connecting it with the supplemental chamber, a stand-pipe from theupper part of said chamber with an air-escape passage andcontrolling-cock by which liquid is allowed to flow from the main tosupplemental chamhere, said cocks being closed when the supplementalchamber is full so that a pressure of air may be accumulated within thesupplemental chamber, a liquid-pipe connecting with the lower part ofsaid chamber and an air-pipe connecting with the upper part of thestand-pipe, valves by which the flow through said pipes is controlled,and a common discharge-nozzle with which the two pipes are connected.

4. An apparatus comprising main and sup plemental chambers, air-pump,connectingpipes and controlling-cocks, separate air and liquid dischargepipes secured together, a nozzle having independent liquid and airpassages, said passages uniting at the discharge end of the nozzle, aball freely movable in one of said passages, a seat against which theball falls to partially close the exit when the nozzle is held in onedirection, and

a pocket into which the ball passes to leave a free passage through thenozzle when the latter is held in the opposite direction.

5. In a spraying apparatus, a main mixingchamber, asupplemental chamberwithapipe connecting the two, an air-pump with pipe connecting it withthe supplemental closed chamber, a cock oontrolling the passage be- 5voir, an air-pump and a pipe leading theretween the two chambers and abell-shaped from to the bottom of the supplemental resend upon the pipewhere it enters the lower ervoir, said pipe having a flexible swingingpart of the main chamber, said-end being section interior to thereservoir. 15 5 perforated soas to discharge air under pres- In witnesswhereof we have hereunto set sure downward and outward within the liquidour hands. contained in said chamber. GEORGE AMBROSE DUNN.

6. A main and a supplemental reservoir ROBERT FRANKLIN DUNN. with aconnecting-pipe, a liquid-discharge Witnesses: 7 10 pipe from the bottomand an air-discharge W. P. BOONE,

pipe from the top of the supplemental reser- F. T. ELAM.

